jason.o
This read action is giving me the above error message, after migration to Ash 3.0. If it’s relevant, key is the source and destination attribute name for Resource1’s belongs_to relationship.
key = "1234"
Resource1.read_by_key!(key)
Resource1
actions do
default_accept :*
read :read_by_key do
argument :key, :string
filter expr(key == ^arg(:key))
end
...
code_interface do
domain ...
define :read_by_key, action: :read, args: [:key]
...
Where Next?
Trending in Questions
Other Trending Topics
Latest Ash Threads
Latest on Elixir Forum
Sponsor Spotlight
Deploy Phoenix to your own VPS with PaaS ease: push-to-deploy, zero downtime, auto SSL, managed Postgres. 14-day free trial at potions.io
Categories:
Sub Categories:
Forums
Popular Tags
- #ecto
- #liveview
- #troubleshooting
- #learning-elixir
- #library
- #deployment
- #erlang
- #testing
- #genserver
- #mix
- #absinthe
- #remote-other
- #otp
- #plug
- #how-to-question
- #macros
- #postgres
- #elixirconf
- #channels
- #exunit
- #discussion
- #code-sync
- #podcasts
- #javascript
- #onsite
- #dialyzer
- #docker
- #authentication
- #umbrella
- #full-time-contract
- #podcasts-by-brainlid
- #ecto-query
- #ai
- #elixirconf-us
- #blog-post
- #elixir-ls
- #phoenix_html
- #iex
- #graphql
- #genstage
- #websockets
- #supervisor
- #advent-of-code
- #distillery
- #processes
- #api
- #forms
- #hex
- #security
- #metaprogramming
Our Sponsors
Build Elixir applications with speed and confidence.
Supporting innovation across the BEAM ecosystem.
We build reliable cloud platforms for business-critical systems.
Catch errors, track performance, monitor hosts and more.
Elixir, Erlang & BEAM conferences from Code Sync - join us in 2026!
Master modern tools, write cleaner code, and tackle real-world challenges.
Producing high quality Elixir screencasts since 2017.
**Building the future of software with AI, trust, and human connection.**
The team behind Membrane, Popcorn, LiveDebugger. Available for hire.
Courses that'll move you from confusion to "Aha, now I get it!"
Showing Posts 1 to 5- Show Best Posts
- Show All (oldest first)
- Show All (newest first)
zachdaniel
Should it be
action: :read_by_key?jason.o
That works. Thank you! I misunderstood
action:is to specify the type of action (:read, :create, etc.) rather than the name of specific function.jason.o
The doc says
action:defaults to the same name as the function which led me to thinkdefine :read_by_key, args: [:key]should workinstead of
define :read_by_key, action: :read_by_key, args: [:key]But it doesn’t because
action:is not optional. What does the Doc mean about the default here?zachdaniel
I’m 99% sure that
actionis optional. What makes you say that it’s not optional? Do you get a required error if you don’t specify it?jason.o
Never mind. There was a typo.